Angelina Jolie’s new liquid detox diet has caused concern on the set of her new espionage thriller, Salt.

The Tomb Raider actress, who plays a CIA officer unmasked as a Russian spy in the upcoming film, is on mission to shed 21 pounds in just 21 days after giving birth to twins less than a year ago.

The diet consists of living on a mixture of lemon juice, cayenne pepper, and maple syrup is also leaving her weak. But tipsters within the film unit say the dangerous diet leaves Angelina drained of energy.

“She does all her own stunts but we worry she could injure herself due to the weight loss,” a set source told The Sun this week.